Machine for treating paper stock



MACHINE FOR TREATING PAPER STOCK Filed March 2 1923 2 Sheets-Sheet 1 ammo June 1 1926. 1,586,951

W. J. HERRBOLD MACHINE FOR TREATING PAPER STOCK hit Fatented dune i, lQZti.

hurrah stares WHERE J. HERBBOIJ), 03E TONAWANEA, YORK.

I MAOEINE FOR TREATING PAPER B'I'GGK.

Application filed March as, 19%. Serial No. 627,940.,

This invention relates to improvements in machines for treating pa er. stock.

The main objects of this invention are:

First, to provide an improved machine for washing and bleaching paper stock as a continuous o eration, the stock being effectively washe and bleached. in passing once through the machine.

Second, to provide an im roved paper stock treating machine in whic paper stock may be efiectively .washed and bleached, the time of treatment or washing bein gauged by the articular requirements of t e stock.

Third, to provide an improved paper stock treating machine in which the amount of washing fluid in the stock at dlfierent stagaes oi the. washing is regulated as desire Fourth, to provide an im roved paper stock treating machine in whic the stock is very evenly treated and very uniform results secured.

Further objects, and objects relatlng to structural details, will definitely appear from the detailed description to follow.

ll accomplish the objects of my invention by the devices and means described in the following specification. The invention 1 clearly defined and pointed out in the claims.

A structure which is a preferred embodimerit of my invention is clearly illustrated in the accompanyin drawing, forming a part of this appllcation, in which:

Fig. I is a plan view of a paper stock treating machine embodying the features of my invention, certain parts being shown in conventional form for convenience in illustration.

Fig. II is a detail side elevation partially in vertical longitudinal section on lines corresponding to lines 22 of Figs. I and III, certain parts being broken away for convenience in illustration.

Fig. III is an enlarged detail transverse section on the lines corresponding to lines 33 of Figs. I and II.

Fig. IV is a detail vertical section on the lines corresponding to lines 44 of Figs. I and II. p

Fig. V is a detail vertical section on a line corres onding to line 5-5 of Fig. I.

In t e drawing similar reference characters refer to similar parts throughout the several views, and the sectional views are taken looking in the direction of the little arrows at the ends of the section lines.

Beferrin to the drawing, I provide a tank 1 pre, erably of U shape as illustrated for the sake of com actness and for convenience of the atten ant. This .tank has a stock inlet 2 at one end and a lurality of discharges 3 located at intermediate points along the tank and a discharge 4 at the rear or dischar e end of the tank.

The disc arges 3 are provided with valves 5 so that they may be opened or closed as desired, thereby providing for a longer or shortplr treatment of the stock as may be requlre Rotatably mounted within the tank is a plurality of rotary washing screens 6.

boss screens are s own conventionally as suitable screens for the pur ose are known in the art and the structure details of the screens form no part of this invention. Each screen is provided with a discharge 7 so that dirty water or washing fluid extracted by each screen is discharged directly from each screen. Between the screens are mixing boxes 8, those in the structure illustrated comprising front walls 9 and rear walls 10, the rear walls being referably higher than the front walls, the ont walls being preferably supported in the vertical guides 11 for vertical adjustment.

The bafile boards 12 are arranged within the boxes so as to direct the stock downwardly within the boxes, that is, these baflie boards prevent a current being set up over the boxes. These bafie boards are preferably arranged, as illustrated, in a forwardly inclined relation with their lower edges adjacent to the upper edges of the front walls 9 and their upper edges overhanging the upper edges of the rear walls. This insures the passing of the stock downwardly into the boxes in position to be acted upon by the a 'tators 13 disposed within the boxes and t e spray pipes 14.

The water or washing fluid spray pipes 14 are preferably dis osed above the agitators and adjacent t 'e rear walls of the boxes. These spray pipes are connected to the supply connection 15 through the regulatin valves 16 so that the amount of washing uid admitted to each box may be independently regulated.

I preferably provide one of the boxes with a spray pi e 17 connected by the pipe.18 to a tank 19 a apted to hold a bleachin mixture, the pipe 18 being controlled y the valve 20. This tank 19 is preferably consaan nected to a second tank 21 which may be used for mixing the bleaching fluid.

The end or cross compartment 22 of the tank 1 is provided with a propeller and a itating device 23 which insures the flow of t e stock and also prevents settling thereof in the tank compartment 22.

To drive the agitators and the screens, I preferably provide a pair of shafts 24 disposed longitudinally between the side portions of the tank, as shown in Fig. I, these shafts being geared to the agitators and to the screens and being provided with separate pulleys 25 so that they may be separately driven permitting the use of only one side of the tank, if desired, using the first discharge 3 located in the compartment 22 of the tank. The stock is caused to flow through the machine by the rotation of the screens, it passing through the mixing boxes from one screen to the succeeding screen. The amount of water drawn off is not such as'to cause the stock to cling to thescreens so that scrapers are required. The screens used by the applicant are of the type quite commonly used in paper stock treating machinery. The stock, as it is moved along from one screen compartment to the other,

flows downwardly under the bafile boards 12.v

In the structure illustrated, the shafts 24 of the washing screens are provided with gears 26 meshing with worm gears on the shafts 24, such gears not being illustrated. The shafts 24 are also provided with worm gears 27 meshing with worm gears 28 on the vertical shafts 29 connected to the shafts of the agitators 13 by the beveled gears 30.

With this arrangement of parts, I am able to effectively and rapidly wash stock with very uniform results, the bleaching and removing the excess of the bleaching chemical as desired bein accomplished as part of a continuous was ing operation.

I have illustrated and described my invention in an embodiment which I have found very practical. I have not attempted to illustrate or describe certain modifica tions and adaptations which I contemplate as I believe the disclosure made will enable those skilled in the art to which my invention relates to embody or adapt the same as may be desired.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. In a machine for treating paper stock, the combination of a tank provided with a stock inlet at one end, a plurality of rotary screens, mixing boxes disposed between the screens, the rear walls being higher than the front walls when the front walls are in normal osition,baflie boards disposed in a rearwardy inclined position with their forward edges adj acentthe front walls and their rear edges overhanging the rear walls of said mixing boxes whereby the flow of the stock is directed through the boxes, agitators disposed w thin said boxes, spray pipes disposed in said boxes above the a itators and adjacent the rear walls of the boxes, and discharge connections for said tank disposed at intervals so that the stock may be subjected to all or to a part of said screens and mixing boxes.

2. In a machine for treating paper stock, the combination of a tank, a plurality of rotary screens, mixing boxes disposed between the screens, the rear walls being h gher than the front walls when the front walls are in normal position, baffle boards d sposed in a rearwardly inclined position with their forward edges adjacent the front walls and their rear edges overhanging the rear walls of said mixing boxes whereby the fiow of the stock is directed through the boxes, agitators disposed within said boxes, and spray pipes disposed in said boxes above the agitators and adjacent the rear walls of the boxes. I i

3. In a machine for treating paper stock, the combination of a tank provided with a stock inlet at one end, a plurality of rotary screens, mixing boxes disposed between the screens, agitators disposed within said boxes, supply pipes disposed in said mixing boxes, supply connections for said spray pipes, said supply connections being provided with regulating valves, at least one of said supply connections being connected to a bleach supply, and discharge connections for-said tank disposed at intervals so that the stock may be subjected to all or to a part of said screens and mixing boxes.

4. In a machine for treating paper stock, the combination of a plurality of screens,

.a mixing box disposed between the screens,

the front wall of said mixing box being vertically adjustable, the rear wall being higher than the front wall when the front wall is in normal position, a baflie board disposed in a rearwardly inclined position with its forward edge adjacent the front wall and its'rear edge overhanging the rear wall of said mixing box whereby the flow of the stock is directed through the box, an agitator disposed within said box, and a spray pipe disposed in said box above the figitator and adjacent the rear wall of the 5. In amachine for treating paper stock, the combination of a plurality of screens, a mixing box disposed between the screens, a baffle board disposed in a rearwardly inclined position with its forward edge adjacent the front wall and its rear edge overhanging the rear wall of said mixing box whereby the flow of the stock is directed through the box, an agitator disposed within said box, and a spray pipe disposed in said box above the agitator and adjacent the rear wall of the box.

III

6. In a machine for treating paper stock, the combination of a plurality of screens, a mixing box disposed between the screens, a baflleboard disposed so that the stock is directed downwardly within the box as it enters the same, an agitator disposed within said box, and a fluid supply connection for said box.

7. In a machine for treating paper stock, the combination of a U-shaped tank, rotary screens, mixing boxes disposed between the screens, agitators disposed in said boxes,

fluid supply connections for said boxes, an agitator disposed in the cross portion of said U-shaped tank, driving means for said agitators disposed between the side portions of said tank, and discharge connections for said tank disposed at intervals so that the stock may be subjected to all or to a part of said screens and mixing boxes.

.In witness whereof, I have hereunto set my hand and seal.

WILLIAM J. HERRBOLD. [1). 8.] 

